Question

Calcule:
A) (2x+y)²=

B) (x-y)²=

C) (2x+1)•(2x-1)=

Answer 1

A) (2x + y)²
(2x)² + 2 . 2x . y + y²
4x² + 4xy + y²

B) (x - y)²
x² - 2 . x . y + y²
x² - 2xy + y²

C) (2x + 1) • (2x - 1)
(2x)² -1²
4x² - 1

Bons estudos!